New Zealand Ocean Acidification Observing Network (NZOA-ON)
Ocean acidification conditions around the New Zealand coast are being measured to establish baseline conditions and to quantify future change.
The NZOA-ON is a network of coastal sites around the country – a mix of pristine and urban sites, and sites which are of particular interest to regional councils, the aquaculture and fishing industries, and sites of scientific interest. Data will be used to determine local conditions, and to provide a baseline against which to measure future change. This network is linked into the Global Ocean Acidification Observing Network (GOA-ON
The network uses existing data collection infrastructure where possible to take advantage of auxiliary data and historic records. Sampling partners collect fortnightly water samples, liaise regarding shipment and logistics, and assist with deployment of the sensors.
Sampling partners collecting the water samples, possibly as part of existing monitoring programmes, have access to the data to help them with their own management strategies. Sampling partners include regional councils, the Department of Conservation, and aquaculture industries.
Water samples are taken fortnightly at each site (see Figure 1 for the sampling sites) by the sampling partners, then the full crates are returned to Dunedin for analysis of acidity parameters - alkalinity and total dissolved inorganic carbon (to develop a long-term data series). We then calculate pHT, pCO2, carbonate ion concentration, and saturation states.
NIWA provides sampling partners with bottles, crates, chemically resistant gloves and training (including health and safety information). The actual sampling isn’t difficult, however sampling partners are required to use a droplet bottle to add a couple of drops of mercuric chloride (which is toxic) into the full sample bottles, so that the seawater is ‘preserved’ until it gets to the lab.
SeaFET pH sensors[2] are deployed for 4-5 months at each site, and are moved from site to site to help determine short term variability at each location.
Additional parameters are measured at the Dunedin and Firth of Thames sites, so that these sites meet the extra requirements of the Global Ocean Acidification Observing Network (GOA-ON).
The network uses data collection infrastructure where possible to take advantage of auxiliary data and historic records.
Simple
- Date (Creation)
- 2017-01-01T02:30:00
- Cited responsible party
-
Organisation name Individual name Electronic mail address Role National Institute of Water and Atmospheric Research (NIWA)
Resource provider University of Otago
Resource provider Cawthron Institute
Resource provider Auckland Council
Resource provider Bay of Plenty Regional Council
Resource provider Marlborough Shellfish Quality Programme
Resource provider Department of Conservation
Resource provider Paua Industry Council Rock Lobster Industry
Resource provider University of Auckland
Resource provider Tuwhitu Marine Farms
Resource provider Ngāti Paoa
Resource provider Ngati Whatua Orake
Resource provider East Otago Taiapure
Resource provider
- Other citation details
-
The citation in a list of references is: "NZOA-ON [year-of-data-download], [Title], [data-access-url], accessed [date-of-access]"
- Purpose
-
As the oceans take up carbon dioxide from the atmosphere, produced by burning fossil fuels, the waters are becoming more acidic. Land practices, such as high nutrient run-off, can also impact the acidity of coastal waters. This will have implications for marine ecosystems, particularly shell forming organisms such as kūtai, pāua, and tio, and early life stages of some fish and shellfish. NIWA and the University of Otago have been measuring ocean carbon chemistry in the waters off Otago since 1998. There is a lot of seasonal and interannual variability, however the long term trend is a gradual increase in acidity, in line with what is being observed at other places around the world. However, we do not know much about other New Zealand locations, particularly coastal regions.
- Credit
-
NZOA-ON
- Status
- On going
-
theme.aodn_aodn-platform-category-vocabulary_version-1-0.rdf
-
-
Fixed station
-
- Place
-
-
Global / Oceans | Pacific Ocean, Regional Seas | Tasman Sea, Countries | New Zealand
-
- Keywords
-
-
theme.aodn_aodn-parameter-category-vocabulary_version-1-1.rdf
-
-
Physical-Water
-
Temperature
-
Salinity
-
Carbon
-
Alkalinity
-
- Language
-
eng
- Character set
- UTF8
- Topic category
-
- Oceans
))
- Begin
- 2016-01-01
- End
Vertical extent
- Minimum value
- -5
- Maximum value
- 0
- Supplemental Information
-
New Zealand Ocean Acidification Observing Network (NZOA-ON) - discrete bottle data - 10 columns - -999 denotes a missing value - Site sampling location - Date (NZST) yyyy-mm-ddThh:mm in NZST - T/oC measured at time of sampling, using a calibrated thermistor - Salinity measured in sample bottle, using a YSI Pro-30 salinity meter - DIC concentration of Dissolved Inorganic Carbon (micro mole per kilogram seawater) - AT alkalinity (micro mole per kilogram seawater) - pH at in situ temperature, on total pH Scale, calculated from Alkalinity and DIC, using refitted Mehrbach constants - carbonate carbonate ion concentration (micro mole per kilogram seawater), calculated from Alkalinity and DIC, using refitted Mehrbach constants - Omega(aragonite) aragonite saturation, calculated from Alkalinity and DIC, using refitted Mehrbach constants - Omega(calcite) calcite saturation, calculated from Alkalinity and DIC, using refitted Mehrbach constants
- Distribution format
-
Name Version Text
1
- OnLine resource
-
Protocol Linkage Name WWW:LINK-1.0-http--metadata-URL
https://nzodn.nz/geonetwork/srv/en/metadata.show?uuid=c476f5ca-5d3c-46be-a961-1adba36f1090 OGC:WMS-1.1.1-http-get-map
https://nzodn.nz/geoserver/nzodn/wms nzodn:acidification_map
OGC:WFS-1.0.0-http-get-capabilities
https://nzodn.nz/geoserver/nzodn/ows nzodn:acidification_data
IMOS:AGGREGATION--bodaac
https://nzodn.nz/geoserver/nzodn/ows acidification_map#url
WWW:LINK-1.0-http--link
https://marinedata.niwa.co.nz/nzoa-on/
Metadata
- File identifier
- c476f5ca-5d3c-46be-a961-1adba36f1090 XML
- Metadata language
-
eng
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2020-03-04T01:02:25
- Metadata standard name
-
ISO 19115:2003/19139
- Metadata standard version
-
1.0
- Metadata author
-
Organisation name Individual name Electronic mail address Role National Institute of Water and Atmospheric Research (NIWA)
Custodian
